CN103821523A - Excavating method for extending existing single-hole two-driveway tunnel into four-driveway tunnel - Google Patents
Excavating method for extending existing single-hole two-driveway tunnel into four-driveway tunnel Download PDFInfo
- Publication number
- CN103821523A CN103821523A CN201410044970.1A CN201410044970A CN103821523A CN 103821523 A CN103821523 A CN 103821523A CN 201410044970 A CN201410044970 A CN 201410044970A CN 103821523 A CN103821523 A CN 103821523A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- existing
- heading
- excavation
- base
- Prior art date
Links
- 238000010276 construction Methods 0.000 claims abstract description 27
- 239000010410 layers Substances 0.000 claims abstract description 14
- 238000009412 basement excavation Methods 0.000 claims description 29
- 238000005056 compaction Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 7
- 239000002689 soil Substances 0.000 abstract 3
- 239000011295 pitches Substances 0.000 description 6
- 238000005422 blasting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering processes Methods 0.000 description 3
- 238000000034 methods Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000006243 chemical reactions Methods 0.000 description 1
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reactions Methods 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
Abstract
Description
Technical field
The present invention relates to construction of tunnel field, relate in particular to the excavation method that a kind of existing single-hole two track tunnel enlargings are highway tunnel with four lanes.
Background technology
Along with developing rapidly of China's economic construction, also rapid growth of the construction of traffic tunnel is also more and more higher to the requirement of highway tunnel daily traffic volume.In some developed areas, existing highway tunnel can not adapt to the growing demand of the traffic volume, and on existing highway tunnel basis, enlarging becomes the more construction of Large Span Road Tunnel and seems particularly urgent.
Existing tunnel extension project is because of technical sophistication, and difficulty of construction is large, and domestic similar engineering is less, and the engineering practice that particularly existing single-hole two track tunnel enlargings are highway tunnel with four lanes approaches blank especially.Forming narrow-bore tunnel at the excavation of existing tunnel extends in the process of large cross-section tunnel to removing existing tunnel liner structure, the stress state of tunnel surrounding process is intricate, reasonably excavation method is larger on country rock disturbance and tunnel deformation impact, directly the safety of impact enlarging construction.
Summary of the invention
Goal of the invention of the present invention is to solve the problems of the technologies described above, and the excavation method that a kind of existing single-hole two track tunnel enlargings that reduce country rock range of disturbance and raising working security are highway tunnel with four lanes is provided.
In order to realize foregoing invention object, the technical solution used in the present invention is:
The excavation method that existing single-hole two track tunnel enlargings are highway tunnel with four lanes, comprises the following steps:
1) backfill existing tunnel is to its haunch place, and compacting;
2) left side, excavation enlarging tunnel top heading, specifically comprises: remove supporting and protection structure more than existing tunnel haunch, the top heading first floor preliminary bracing of construction left side, sidewall temporary lining, interim inverted arch and lock pin ductule;
3) the lower base tunnel in left side, excavation enlarging tunnel, specifically comprises: remove supporting and protection structure and road surface below existing tunnel haunch, the lower base tunnel first floor preliminary bracing in construction left side and sidewall temporary lining;
4) excavation enlarging right side, tunnel top heading, specifically comprises: construction right side top heading first floor preliminary bracing, interim inverted arch and lock pin ductule;
5) base tunnel under excavation enlarging right side, tunnel, specifically comprises: base tunnel and right side top heading under base tunnel first floor preliminary bracing under construction right side, right side;
6) construction enlarging tunnel invert second layer preliminary bracing and inverted arch secondary lining;
7) the sidewall temporary lining of base tunnel under dismounting left side top heading and left side, and the interim inverted arch of left side top heading and right side top heading;
8) construction enlarging tunnel arch wall second layer preliminary bracing, lays hoop french drain and splash guard, monobloc cast arch wall portion secondary lining.
Wherein, in step 1), backfill adopts backfill back-filling in layers, and compaction in layers.
Wherein, step 2) in the temporary lining of top heading sidewall be arranged on the right positions near existing tunnel supporting and protection structure, lock pin ductule is two, every pin, is less than or equal to 30 ° with the vertical line angle of cut.
Wherein, in step 3), lower base tunnel sidewall temporary lining is arranged on the right positions near existing tunnel supporting and protection structure, and connects with the temporary lining of top heading sidewall is suitable.
Wherein, under left side, base tunnel and left side top heading longitudinal pitch are less than 5m, and seal into ring in time.
Wherein, in step 5), under right side, base tunnel and right side top heading longitudinal pitch are less than 5m, and under right side, under base tunnel and left side, base tunnel longitudinal pitch is greater than 15m.
Beneficial effect of the present invention is: this excavation method realizes the interim balance of pressure from surrounding rock by backfill existing tunnel, utilize the free face of existing tunnel to carry out the excavation of base tunnel in advance, effectively reduce the range of disturbance of country rock, improve the safety of super-large span tunnel enlarging construction.
Accompanying drawing explanation
Fig. 1 is the constructing structure schematic diagram in the embodiment of the present invention.
1: backfill; 2: existing tunnel supporting and protection structure; 3: left side top heading; 4: first floor preliminary bracing; 5: the temporary lining of top heading sidewall; 6: the interim inverted arch of left side top heading; 7: lock pin ductule; 8: base tunnel under left side; 9: the temporary lining of lower base tunnel sidewall; 10: right side top heading; 11: the interim inverted arch of right side top heading; 12: base tunnel under right side; 13: second layer preliminary bracing; 14: secondary lining.
The specific embodiment
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
See also Fig. 1, as shown in the figure, the excavation method that existing single-hole two track tunnel enlargings of the present invention are highway tunnel with four lanes, comprises the following steps:
1) backfill existing tunnel, to haunch, adopts backfill 1, and compaction in layers;
2) excavate in advance left side, enlarging tunnel top heading 3, comprise and remove the above existing tunnel supporting and protection structure 2 of haunch, top heading first floor preliminary bracing 4 on the left of construction, top heading sidewall temporary lining 5, the interim inverted arch 6 of left side top heading and lock pin ductule 7.Top heading sidewall temporary lining 5 is arranged on the right positions near existing tunnel supporting and protection structure 2.Lock pin ductule 7 is 2, every pin, should not be greater than 30 °, to guarantee to lock pin effect with the vertical line angle of cut.
3) the lower base tunnel 8 in left side, excavation enlarging tunnel, comprises and removes the following existing tunnel supporting and protection structure 2 of haunch and road surface, the lower base tunnel first floor preliminary bracing 4 in construction left side and lower base tunnel sidewall temporary lining 9.Lower base tunnel sidewall temporary lining 9 is arranged on the right positions near existing tunnel supporting and protection structure 2, and connects with top heading sidewall temporary lining 5 is suitable.The lower base tunnel 8 in left side and left side top heading 3 longitudinal pitches should not be greater than 5m, and seal into ring in time.
4) excavation enlarging right side, tunnel top heading 10, construction right side top heading first floor preliminary bracing 4, the interim inverted arch 11 of right side top heading and lock pin ductule 7.
5) base tunnel 12 under excavation enlarging right side, tunnel, base tunnel first floor preliminary bracing 4 under construction right side; Under right side, base tunnel 12 and right side top heading 10 longitudinal pitches should not be greater than 5m, and under right side, under base tunnel 12 and left side, base tunnel 8 longitudinal pitches should not be less than 15 meters.
6) construction enlarging tunnel invert second layer preliminary bracing 13 and inverted arch secondary lining 14;
7) the sidewall temporary lining of base tunnel under dismounting left side top heading and left side, and the interim inverted arch of left side top heading and right side top heading.When temporary lining and interim inverted arch are removed, monitoring measurement be must strengthen, country rock and preliminary bracing 4 deformations grasped in time, and the length that adjustment is once removed according to measurement, once remove longitudinal length and should be less than 1m.Can take measures that if desired preliminary bracing 4 is carried out to part and strengthen, to ensure safety.
8) construction enlarging tunnel arch wall second layer preliminary bracing 13, lays hoop french drain and splash guard, monobloc cast arch wall portion secondary lining 14.
Before the each excavation with guide pit in enlarging tunnel, adopt the construction ancillary methods such as Shed-pipe Advanced Support, advanced tubule slip casting and sidewall advance anchor bolt, when excavation, adopt the controlled blasting technology such as smooth blasting, slight dynamite, presplit blasting, and shake the adverse effect to tunnel surrounding by the strict controlled blasting of the monitoring means such as monitoring of blasting vibration, one time excavation length should be less than 1m.
Reinforced concrete arch wall lining in 2 dismountings of existing tunnel supporting and protection structure is built and is adopted coupling charging structure and enough loaded lengths, thereby forms good free face, causes stress wave multiple reflections, and reinforcing bar and concrete are thrown off, and concrete is fully broken.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes manual of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410044970.1A CN103821523A (en) | 2014-02-07 | 2014-02-07 | Excavating method for extending existing single-hole two-driveway tunnel into four-driveway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410044970.1A CN103821523A (en) | 2014-02-07 | 2014-02-07 | Excavating method for extending existing single-hole two-driveway tunnel into four-driveway tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103821523A true CN103821523A (en) | 2014-05-28 |
Family
ID=50756785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410044970.1A CN103821523A (en) | 2014-02-07 | 2014-02-07 | Excavating method for extending existing single-hole two-driveway tunnel into four-driveway tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103821523A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988748A (en) * | 2017-03-15 | 2017-07-28 | 中铁二院工程集团有限责任公司 | High-order parallel heading construction and the construction method that capacity expansion revamping is double line tunnel |
| CN109538219A (en) * | 2018-12-21 | 2019-03-29 | 中铁四局集团有限公司 | The enlarging large section in situ and partial excavation method in crushing hard rock tunnel |
| CN109630138A (en) * | 2018-12-21 | 2019-04-16 | 中铁四局集团有限公司 | The steelframe dike combined support partial excavation method of enlarging large section tunnel in situ |
| CN109695457A (en) * | 2018-12-21 | 2019-04-30 | 中铁四局集团有限公司 | The enlarging large section tunnel in situ and step construction method of hard rock |
| CN110374608A (en) * | 2019-08-28 | 2019-10-25 | 贵州大学 | The excavation method in vault direction when a kind of existing tunnel is extended |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737061A (en) * | 2009-12-24 | 2010-06-16 | 中国水电顾问集团华东勘测设计研究院 | Method for constructing double-arch tunnel by rebuilding and expanding existing single-hole tunnel |
| CN103114856A (en) * | 2013-03-05 | 2013-05-22 | 福州市规划设计研究院 | Construction method for in-situ broadening and remolding of existing double-arched tunnel |
| CN103306680A (en) * | 2013-03-23 | 2013-09-18 | 中铁二院工程集团有限责任公司 | Construction method for extending single-track tunnel to multi-track tunnel |
-
2014
- 2014-02-07 CN CN201410044970.1A patent/CN103821523A/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737061A (en) * | 2009-12-24 | 2010-06-16 | 中国水电顾问集团华东勘测设计研究院 | Method for constructing double-arch tunnel by rebuilding and expanding existing single-hole tunnel |
| CN103114856A (en) * | 2013-03-05 | 2013-05-22 | 福州市规划设计研究院 | Construction method for in-situ broadening and remolding of existing double-arched tunnel |
| CN103306680A (en) * | 2013-03-23 | 2013-09-18 | 中铁二院工程集团有限责任公司 | Construction method for extending single-track tunnel to multi-track tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 唐颖: "大帽山大跨度扩建隧道设计要点", 《公路》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988748A (en) * | 2017-03-15 | 2017-07-28 | 中铁二院工程集团有限责任公司 | High-order parallel heading construction and the construction method that capacity expansion revamping is double line tunnel |
| CN109538219A (en) * | 2018-12-21 | 2019-03-29 | 中铁四局集团有限公司 | The enlarging large section in situ and partial excavation method in crushing hard rock tunnel |
| CN109630138A (en) * | 2018-12-21 | 2019-04-16 | 中铁四局集团有限公司 | The steelframe dike combined support partial excavation method of enlarging large section tunnel in situ |
| CN109695457A (en) * | 2018-12-21 | 2019-04-30 | 中铁四局集团有限公司 | The enlarging large section tunnel in situ and step construction method of hard rock |
| CN109538219B (en) * | 2018-12-21 | 2020-10-20 | 中铁四局集团有限公司 | In-situ expansion super-large section and partial excavation method of broken hard rock tunnel |
| CN110374608A (en) * | 2019-08-28 | 2019-10-25 | 贵州大学 | The excavation method in vault direction when a kind of existing tunnel is extended |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103334422B (en) | Assembled embedded type prefabricated hollow underground continuous wall and construction method thereof | |
| CN102996148B (en) | A kind of high ground stress soft rock stress vcehicular tunnel method for protecting support | |
| CN101666232B (en) | Construction method of six-zone digging of super cross section tunnel | |
| CN101864959B (en) | Method for tunneling construction of main structure of underground station | |
| CN101963061B (en) | Construction method for underground box culvert of existing railway line | |
| CN102587922B (en) | Oblique-crossing inclined shaft upper arc guide top brushing construction method for soft crushed rock layer | |
| CN102094425B (en) | Foundation pit construction method adopting shallow buried depth Larsen steel plate pile as protective cofferdam | |
| CN101967985B (en) | Self-propelled inverted arch template construction method | |
| CN100591862C (en) | Pit construction method adopting prefabricated support | |
| CN104452809B (en) | A kind of super shallow tunnel cover and cut construction method | |
| CN102277898B (en) | Drain pipe jacking construction method | |
| CN103306289B (en) | Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof | |
| CN102606167B (en) | Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel | |
| CN103485288B (en) | A kind ofly pass through both wired double-deck jacking culvert construction technology | |
| CN103321653B (en) | Method of treating lining after collapse of underground cavern crown | |
| CN205422813U (en) | Detachable filling and retaining wall | |
| CN102134998B (en) | Construction method for wind-blown sand tunnel | |
| CN102996133A (en) | Construction method applicable to intersection between inclined shaft and slant hole of weak surrounding rock tunnel | |
| CN105926669A (en) | Construction method of subway station | |
| CN101858222B (en) | Method for controlling deformation in zero-distance tunneling of new tunnel under existing subway construction | |
| CN102094649B (en) | Method for constructing underground space by shield-shallow buried covered excavation composite method | |
| CN106351670B (en) | A kind of closed pre support tunnel structure | |
| CN105697021B (en) | The prefabricated tunnel and construction method in the shallow earthing riverbed of shield crossing | |
| CN106869944A (en) | The extra small clear-distance tunnel construction method in underground interchange intersection under complex environment | |
| CN103527219A (en) | Tunnel supporting structure used for large deformation stratum and construction method of tunnel supporting structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C06 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140528 |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) |